Casing-head.



(LA. WAITZ. cAsmG HEAD.,

A APPLICATION FILED AIfRJ, 1906. BENEWED NOVY'. 10, 1908. 91 0,885

IPatented Jan. 26, 1909.

2 SHEETS-SHEET 2.

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To all 'whom 'it may concern:

UNITED sTATEs CHARLES, A. wAiTz, or RoUsEVILLE, PENNSYLVANIA.

casING-BEA'D.

Specification of Letters Patent.

Patented Jan. 2 6, 190e.

Apparati@ meri Aprii 1s, 190s, serai No; 312,365. Renewed November 1o, 190s. serial No. 461,961. v i

Be it known that I, CHARLES A. WArrz', a citizen of the United States of America, residin at Rouseville, in the county of Venango and tate of Pennsylvania, have invented certain new and useful Improvements in Casing-Heads, of which the following is a specification, reference being had therein to t e accompanying drawing.

This invention relates to certain new and useful ini rovements in casing heads for oil wells, an the invention relates particularly to that type of casing head designed to support atubing in the casing of an oil well.

It is now generally the custom in shallow territory (300to 1200 feet in dept that when awell has been completed the rilling ng, including the derrick is removed, and in many cases `where the derrick is removed or blown down, to 4put `up a ole, or poles instead of a derrick built of umher, using the round for derrick floor. The drilling, or

errickvfloor, is usually above the ground,

` and the well being cased to the top `of the oor, would leave the casing-head too high above ,the ground if put on top of the casing when saidl floor is removed, which necessitates cuttin'V and threading the casing at the desired leve causin considerable expense.

The head which Iiave devised primarily involves in combination with a casing, a safety top, capable of supportingy one or more tubings within a casing. .Upon the basis of this combination, the application comprehends first, a two-part cast' lin the form of a Casin head; second, a head 'aving anintegral sa ety top; third, a safety t capable of being cut to permit lowering t e tubin before raising; and lastly, a casing hea wherein a tight andeffective joint can beestablished between the head and the casing of an oil well.

With the above and other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts to be hereinafter more fully described, illustrated and claimed'.

The essential features ofthe present inven-A tion involved in carrying out the objects above specified, 'are necessarily susceptible to structuralchange without departing from the scope ofthe invention but the preferred accompanying drawings, wherein likenumerthroughout the several views, 1n 'whic Figure 1 is a side elevation of my improved casing head, Fig. 2 is fa vertical sectional view of the same, illustrating the head as mounted upon the upper en d of the casing of a well, and supporting Aa tubing therein, Fig. .3. is a plan ofthe head, Fig-4 is a bottom lan of the head illustrating a casing and tu ing mounted therein, the casing and tubing bei shown in section. 5 is a central vertida preferred embodiment of my invention, in which the safety top is made integral with plan of the head illustrated in Fig. 6 ofthe drawings.

ence numeral 1 designates the upper end of an oil well casing, this end of the casing having been out. at a desired level relative to the ground 2 or the derrick floor (not shown) of an oil well rigging.

l ily invention resides in the novel casing head 3 which is mounted upon the upper end of the casing 1. The head 3 consists of a cylindrical body including a cylindrical portion 4 and carrying a de ending sleeve 5 vThe cylindrical bod portion 4 of the head is provided with a epending annular apron 6, which surrounds the sleeve 5 and provides an annular vertically disposed poc et 7 to receive the upper end of the casing 1. The pocket prior to receiving the'u per end of the casing 1s provided with a surta le packing Aor stuffing and 8` adapted to form a tight connection between the upper end of the casing 1 and the head 3.

The cylindrical body portion 4 of the head is provided with two diametrically oppcs'ed interior'ly threaded nipples 9, 9 commumcatin with the chamber, these nipples being a apted to receive the threaded ends of pipes embodiments of the same are shown in the.

the casing head. Fig. 6 is a similar view ofanother modification illustrating a head provided with a double safety top, and Fig.7 is a l In the accompanying drawings, the refeials of reference designate corre pondinparts 'Sectional view er a easing head showings which is adapted to iit wit in the casing 1.

'of an oil well, the coupling 17 of said tubing resting upon the annular shoulder 18 of the contractedv end 14 of theysafety top., The Weight o f thetubing 16, which asses downwardly a proximately to the "ottom of a well, 1s a apted to retain the safety top 12 upon the head 3, also pressing Asai ead firmly upon the upper end of said casing',

thei'eby providingla tight joint between the caslngand said ead. In some instances,

i however, the depending apron or flange 6 can be provided with set screws 19, 19 which ma engage the up er end of the casing 1 firmly hold'saldpheadupon said casing.

A preferred Aand practical embodiment of I the generic idea of my invention is illustrated in Flg. 5 of the dra In this construction the cylindricalbo y portion 4 is of the same construction generally, as heretofore described for the construction shown in'Figs.

1 to 4, that is, it is provided'with the dependsleeve 5, the annular portion or skirt 6, ---with space 7 between said skirt or portion 6,

and the sleeve 5, andthe interiorly screwthreadedrnipples 9 located at opposite sides -of the body other.' In t ortion in alinement with each his construction however, the inwardlv-extending flange 10v which vapparently cl'oses the casing at the top. hasthe safety top 12' integral therewith, Instead of being separate therefrom as in thel construction'shown in Figs. V1 to4. It will be noted that in this construction, as well as inthe construction shown in Figs.v 1 to 4, that the I safetytop is carried 'bythe annular inwardly terior construction as the form of safet struction'. The safet extend il e 10, which flan e is integral .with thlgtubotiiylgportion in both fgbrms of contop. 12in the construction shown in-Fig. 5 has the same intop shown in Figs.'1 2, that is, it is c ambered at its up er end interiorly forming-l annular fshoul er 18 on which the coup of the'tubing is adapted to rest inthe same manner as is shown m Fig. 2 of the drawings.

In Figs. 6 and 7 of the drawings, is shown a further modiiication of my invention, means be' shown in this view for the s porting of the tubing, and the reception o a steam pipe (not shown). The cylindrical -body ortion 4,' in this type of construction is 'like t e conmanner asithe liange on the safetytop ground. l

provided by the construction struction above described, provided with the interiorly threaded nip les 9, located at opposite sides'of the bod)y and alining with each other, but instead ofthe top of the casing head per se com rising only an annular inwardly-extending ange, as in the constructions afore described,the top of the said casing has aplate 12, closin top with the exception o 1,1 11b, made in said plate, the opening 11bbeing adapted to receive the lower end of a safety top 12b, which is sup crted on the plate `by an annularpflange ormed on the safety top and engaging the plate in the same gages flange 10 in the construction-s 1n Fig. 2 similarly, the opening 11a receives a safety top 12a, supported on `the plate 12 the safety top 12b.

1n lthe same manner as The safety top 12b is adapted to support the tubin inthe same manner as shown in Fig. 2, while the safety top 12 is adapted to re*- ceive a ,steam ipe (not shown).

The casing cad, as above described, is extremely convenient where both derrick or poles are removed and the tubing or rods re'- moved from the well by means of a portable derrick ullin machine, common in the oil welliields at ie present day. Another feature of my im roved casing head resides in the fact that' t e head can be locatedas near the casing at the circular openings the ground as possible, thus permitting of the oil and as conveying ipes attached to the ground this being essential where the wells are located near -creeks or rivers, and on tilled soil, the high water and ice of the creeks and rivers be' oil conveying pi es an head if not protected 1n being locate `m close proximity to the In roviding the casing head with van integra safety top, I dispense with a packed 'omt heretofore used and by provi the ead with the set screws 19, 19 said hea will be firmly held upon the casing while the tubing 1s being removed from a well.

, It is thought from the foregoing descrip# tion that the construction and .novel advantaes of my im roved casing head will be fu y undelstoo and while I have herein described the preferred manner of constructing my improvedl head, itis obvious that such changes, in the, size, proportion and minor details ofconstruction, as are permissible by the appended claim, may be resorted to without 'departing from the spirit andv sccpl of the invention.

located un er the surface of the liable to damage the v at I claim and desire to secureby Let- -t-ers Patent, is:-'-

' As a new article of manufactura a casing head comrising a tubular body having an internal c amber and withtwo depending separated sleeves on its lower end forming an easing an erases annular seoe to vreeeive the upper end of a, l In testimony whereof afx my signature Vln'wilg pipe reoeivlg opennsmn i in the presence of two witnesses.

its op oste si es, an 'inwar y exten g i l y K y. f

engep rojectng over the chamber and the i CLES A WAT' easing eed, and a safety top carried by said Witnesses:

fiance with its lower end projecting only to A. M. WILSON,

the oWer face of the ange. 1 K. H. BUTLER. 

